EP0210111B1 - Überbau mit Zwischenportal für eine Elektrolysenwanne zur Herstellung von Aluminium - Google Patents

Überbau mit Zwischenportal für eine Elektrolysenwanne zur Herstellung von Aluminium Download PDF

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Publication number
EP0210111B1
EP0210111B1 EP86420140A EP86420140A EP0210111B1 EP 0210111 B1 EP0210111 B1 EP 0210111B1 EP 86420140 A EP86420140 A EP 86420140A EP 86420140 A EP86420140 A EP 86420140A EP 0210111 B1 EP0210111 B1 EP 0210111B1
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EP
European Patent Office
Prior art keywords
gantry
tank
legs
tank according
supported
Prior art date
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Expired
Application number
EP86420140A
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English (en)
French (fr)
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EP0210111A1 (de
Inventor
Christian Duval
Bernard Langon
Michel Leroy
Alain Noizet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rio Tinto France SAS
Original Assignee
Aluminium Pechiney SA
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9319951&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0210111(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Aluminium Pechiney SA filed Critical Aluminium Pechiney SA
Priority to AT86420140T priority Critical patent/ATE44555T1/de
Publication of EP0210111A1 publication Critical patent/EP0210111A1/de
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/10—External supporting frames or structures

Definitions

  • the present invention relates to a device of the gantry type, intended to support in its middle, or at one or more intermediate points, the superstructure of a Hall-Héroult electrolysis tank for the production of aluminum.
  • the superstructure of a modern electrolysis tank is made up of one or more horizontal steel beams supported on feet at their ends and supporting on the one hand the anodic current ascents and the anodic frame, formed by bars of aluminum from which the anodes are supplied, and on the other hand the alumina supply systems (alumina tank, crust breaker, metering distributor), the anode up-down control systems, and very often , the effluent, gas and dust collection pipes emitted by the tank.
  • alumina supply systems alumina tank, crust breaker, metering distributor
  • the feet are supported at the ends of the metal box which constitutes the actual electrolysis tank.
  • This arrangement has the advantage of freeing up space on the two large sides of the tanks, through which the anodes are changed, and of not transmitting to the superstructure the transverse thermal expansions which appear in the current part of the box. after starting the tank, during start-up.
  • the current trend is to constantly increase the unit power of the tanks, which results in an elongation of the box, the length of which can now be between 15 and 20 meters for tanks operating under 250 KA and beyond.
  • the construction of the superstructure poses a difficult problem: the process of regulating the tanks indeed requires extremely precise positioning of the anode plane with respect to the cathode plane formed by the sheet of liquid aluminim which remains perfectly horizontal (except weak local deviations from magnetic effects).
  • the invention aims to solve the problem of the rigidity of the superstructure of modern high-power tanks, for the production of aluminum by the Hall-Héroult process, working at intensities ranging from more than 200,000 to 500 000 amperes and even beyond, without interfering with the normal operation of the tanks which includes, in particular, the periodic changes of spent anodes.
  • a tank for the production of aluminum according to the Hall-Héroult process by electrolysis of alumina in molten cryolite the tank being constituted by a rigid metal box, internally lined with heat insulation and provided with a carbon cathode, elongated parallelepiped shape, the two ends of which are called heads, and by a superstructure constituted by at least one rigid beam arranged along the long length of the box, in particular supporting the anode frame supplied with current by positive rises, and on which the anodes, this beam resting, at its ends, on supports arranged at the two heads of the tank, this superstructure being characterized in that each rigid beam rests on at least one intermediate gantry.
  • the support leg (s) of this gantry are preferably placed in line with conductors bringing the current coming from the previous tank, and the supports include means for expanding independently of the box.
  • the beam can be, in its length, constituted by a single element, or by several distinct elements.
  • Figure 1 recalls the structure, in cross section of a modern electrolysis tank, PECHINEY type.
  • Figures 2 to 5 relate to the invention; to respect the proportions (width / length of the box), part of the length of the superstructures has been truncated in these 2 figures. Furthermore, the fixing devices have not been shown anodes, and the height adjustment devices of the anode assemblies, which are not part of the invention and are well known to those skilled in the art.
  • the essential organs of the electrolysis cell have been underlined the metal box (1), the internal lining (2), the cathode (3) and the cathode bar (4), the sheet of liquid AI ( 5), the molten cryolith bath (6) covered with a solidified crust (7), the anodes (8) suspended by the rods (9) and fixed to the anode frame (10) and the superstructure formed by the two rigid beams (11), which support, in particular, the anode frame (10), the set of anodes (8), as well as the alumina metering distributor (12), whose local storage silo (13) is often placed between the two beams (11), as well as the effluent collection pipes not shown.
  • FIG 2 which shows an example of a superstructure according to the invention
  • the outline of the upper rim (15) of the box (1) is shown diagrammatically.
  • the rigid beams (11) which form the superstructure are separated into two parts (11A) and (11B), the outer ends of which rest on the feet (16A) and (16B), arranged at each head of the tank and the central ends. are based on the gantry (17).
  • this gantry itself comprises 4 feet (18) which are supported on the upper edge (15) of the box in its central part.
  • This support system must take account of the fact that the box expands during service, in particular in the transverse direction, and it therefore does not really constitute a fixed support point. It is therefore necessary to provide for a freedom of movement of this support in the direction of expansion of the box, that is to say in the general direction of the current flowing through the line of tanks arranged transversely relative to the axis of the line, for example by means of roller bearings suitably protected against abrasive alumina dust and other constituents of the electrolyte.
  • the superstructure is divided into two independent parts (11 A) (11B), arranged on either side of the intermediate gantry, there are no longer any bending stresses at the gantry; in addition, the manufacture, transport and installation of the two elements are simplified, thanks to the reduction in length and weight.
  • the support of the ends of the beams (11A) and (11B) on the intermediate gantry (17) is preferably done by a means making it possible to absorb the slight relative movements of the supports of the beams on the gantry.
  • a simple solution consists in letting the central ends of the beams (11A) and (11B) rest freely on the upper part (19) of the gantry (17).
  • the anode frame (10) is preferably also made up of two parts, so as to distribute the expansions on either side of the center of the superstructure. There is then between the two parts of said frame an expansion joint ensuring electrical contact, for example a loop of aluminum strips, or any other equivalent means.
  • the solution of the central gantry (17) with four legs offers the advantage of making it a stable element in itself, which can thus be used as a support and connection member for a superstructure in two independent sections, and even serve supporting the motorization assemblies of the up-down movements of the anodes; the central position favoring the distribution of the forces on the two half-frames supported by the two half-beams.
  • the support of the feet (18) of the gantry can be carried out, as said above, on the upper edge (15) of the box, but also outside, on specialized elements, for example a solid or reinforced concrete pillars.
  • This arrangement - which overcomes the problems of transverse expansion of the box - however requires to increase the space between the tanks, therefore to lengthen or widen the building, which affects the cost price.
  • FIG. 3 Another embodiment of the invention (fig. 3) consists in supporting each half-section of the beams (11A) (11B) by two independent gantries (20) with two feet (23A) (23B), one for the ends (24A) of (11A) and one for the ends (24B) of (11B). In this case, and to ensure stability, each gantry (20A, 20B) must be welded respectively to the beams (11A) (11B), at the supports (21A, 21 B).
  • FIG. 4 another alternative embodiment of the invention has been shown, in which the intermediate gantry has a shape reminiscent of that of a capital A (25), the support of the beam (11) is making on the horizontal bar (26) of A.
  • a particularly advantageous embodiment consists in using, as gantry, two elements in A, braced, so as to form a rigid gantry, the two elements being spaced apart by a distance such that the one can accommodate, between them, a current rise (29) which is connected to the frame (10).
  • the positioning of the gantry at at least one of the current rises (29) coming from the previous tank is, moreover, entirely compatible with the two and four foot gantry structures of FIGS. 2 and 3.
  • FIG. 5 represents another form of implementation of the invention, particularly simplified, since it is reduced to a horizontal support beam (27) resting on two feet (28) - (the second is not visible in the figure).
  • the horizontal support beam (27) is shown in tubular, square form, but it can also be formed by any conventional profile, for example in 1, the dimensions of which are based on well known calculations of resistance of materials.
  • the climbs (29) in line with the intermediate support (27) (28), that is to say substantially in the same vertical plane as this support, the flexible foils (30) which provide the electrical connection between the rise (29) and the anode frame (10) being connected to this frame (10) in the hatched area (31), so as to free up the maximum space for anode change operations such as (8) or (8A) worn.
  • the rigid beams (11) are divided into two parts and rest on a central gantry, it is obvious, for the person skilled in the art, that it also applies to the case where, for a larger tank, the rigid beams (11) are divided into more than two parts, for example three parts, equal or not, supported by two intermediate gantries two or four feet .
  • These tank superstructures can therefore be made in a modular fashion, so that their maximum length is no longer limited by the weight of the beams and the transport and installation difficulties, which added to the bending problems.
  • the invention makes it possible to take account of the effects of deflection of the beam, due to differential thermal expansions.
  • the horizontal support beam such as (26) or (27) of the gantry is subjected to temperature variations which are a function of the alumina covering of the crust. The highest temperature will be reached during a change of anode near this beam, this change causing a rupture of the solidified electrolyte crust, and direct radiation of the electrolysis, at about 930 - 960 °, on the superstructure.
  • the invention in the various modes of implementation which have been described, removes one of the most serious obstacles to the production of tanks at 500,000 amperes (and even beyond), whose technical and economic advantages are very attractive.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Road Paving Structures (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Revetment (AREA)
  • Hybrid Cells (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Claims (13)

1. Wanne für die Aluminiumerzeugung nach dem Hall-Héroult-Verfahren durch Elektrolyse von Aluminiumoxid in geschmolzenem Kryolith, welche Wanne aus einem starren, wärmeisolierten metallischen Kasten von länglicher Parallelepipedform, dessen beiden Enden Köpfe genannt werden, und aus einem Überbau zusammengesetzt ist, der aus wenigstens einer längs der großen Länge des Kastens angeordneten starren Schiene besteht, insbesondere den Anodenrahmen und die von der vorhergehenden Wanne in der Gruppe kommenden Stromzuführungen und die Anoden trägt und an seinen beiden Enden auf an den beiden Köpfen der Wanne angeordneten Stützen ruht, welcher Überbau dadurch gekennzeichnet ist, daß jede starre Schiene (11) auf wenigstens einer mit Füßen versehenen Zwischenbrücke (17) abgestützt ist.
2. Wanne nach Anspruch 1,
dadurch gekennzeichnet,
daß die Brücke (17) vier Füße (18) derart aufweist, um einen selbststabilisierten Aufbau zu bilden.
3. Wanne nach Anspruch 1,
dadurch gekennzeichnet,
daß die Brücke (17) aus zwei Halbelementen (20A) (20B) gebildet ist, deren jedes mit zwei Füßen (23A) und (23B) versehen ist.
4. Wanne nach Anspruch 1,
dadurch gekennzeichnet,
daß die Brücke aus einer einfachen horizontalen Stützschiene (27) besteht, die sich auf zwei Füßen (28) abstützt.
5. Wanne nach Anspruch 1,
dadurch gekennzeichnet,
daß jede starre Schiene (11) in wenigstens zwei Abschnitte (11A) (11B) unterteilt ist, deren mittlere Enden (24A, 24B) auf der Brücke (17) oder (20A, 20B) abgestützt sind.
6. Wanne nach den Ansprüchen 3 und 5,
dadurch gekennzeichnet,
daß die mittleren Enden (24A) (24B) der starren Schienen (11A) (11B) beispielsweise durch Schweißen auf den Halbelementen (20A) (20B), die sie abstützen, befestigt sind.
7. Wannen nach irgendeinem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Füße (18) oder (23A) (23B) oder (28) der Brücke (17) auf dem Rand (15) des Kastens frei aufliegen.
8. Wanne nach irgendeinem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Füße (18) oder (23A, 23B) oder (28) der Brücke (17) auf dem Rand (15) des Kastens durch ein Mittel, das eine Relativbewegung ermöglicht, wie z. B. Rollwege mit Rollen, aufliegen.
9. Wanne nach irgendeinem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Füße (18) oder (23A, 23B) oder (28) der Brücke (17) auf dem Rand (15) des Kastens durch ein Mittel aufliegen, das eine Relativbewegung ermöglicht, die Füße an der Stromauf- oder Stromabseite auf dem flachen Rand angelenkt sind, wobei die Anlenkung längs einer zur großen Achse der Wanne parallelen Achse angeordnet ist, und daß die entgegengesetzten Füße an der Stromab- oder Stromaufseite direkt auf dem Kasten aufliegen.
10. Wanne nach irgendeinem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die vertikale Querebene P, die zur großen Achse AA' der Wanne senkrecht ist und durch die Achse X der Zuführung (29) verläuft, und die vertikale Ebene P, die durch die Achse Y der Zwischenbrücke (17) (25) verläuft, im wesentlichen übereinstimmen.
11. Wanne nach irgendeinem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die horizontale Stützschiene (26) (27) der Zwischenbrücke wenigstens ein Mittel zum Schutz gegen die Wärmestrahlung des Elektroysebades aufweist.
12. Wanne nach Anspruch 11,
dadurch gekennzeichnet,
daß das Mittel zum Schutz gegen die Strahlung des Bades aus einer unter der horizontalen Stützschiene angeordneten Wärmeabschirmung besteht.
13. Wanne nach Anspruch 11,
dadurch gekennzeichnet,
daß das Mittel zum Schutz gegen die Strahlung des Bades aus einem Mittel zur raschen Abführung der von der horizontalen Stützschiene absorbierten Wärmemengen besteht, das unter der Luftzirkulation in der und/oder um die Schiene, der Verwendung von Wärmeleitern, den Wärmebrücken aus gut leitendem Metall (Aluminium oder Kupfer) zwischen dem unteren Teil und dem oberen Teil der Schiene gewählt ist.
EP86420140A 1985-05-30 1986-05-27 Überbau mit Zwischenportal für eine Elektrolysenwanne zur Herstellung von Aluminium Expired EP0210111B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86420140T ATE44555T1 (de) 1985-05-30 1986-05-27 Ueberbau mit zwischenportal fuer eine elektrolysenwanne zur herstellung von aluminium.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8508578A FR2582677B1 (fr) 1985-05-30 1985-05-30 Superstructure de cuve d'electrolyse avec portique intermediaire, pour la production d'aluminium
FR8508578 1985-05-30

Publications (2)

Publication Number Publication Date
EP0210111A1 EP0210111A1 (de) 1987-01-28
EP0210111B1 true EP0210111B1 (de) 1989-07-12

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ID=9319951

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Application Number Title Priority Date Filing Date
EP86420140A Expired EP0210111B1 (de) 1985-05-30 1986-05-27 Überbau mit Zwischenportal für eine Elektrolysenwanne zur Herstellung von Aluminium

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Country Link
US (1) US4720333A (de)
EP (1) EP0210111B1 (de)
JP (1) JPS6289889A (de)
CN (1) CN1007360B (de)
AT (1) ATE44555T1 (de)
AU (1) AU576469B2 (de)
BR (1) BR8602470A (de)
DE (1) DE3664342D1 (de)
ES (1) ES8705051A1 (de)
FR (1) FR2582677B1 (de)
GR (1) GR861372B (de)
HU (1) HU198532B (de)
IN (1) IN166372B (de)
IS (1) IS1372B6 (de)
NO (1) NO862132L (de)
NZ (1) NZ216335A (de)
OA (1) OA08332A (de)
YU (1) YU91086A (de)
ZA (1) ZA864014B (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694945B1 (fr) * 1992-08-20 1994-10-07 Pechiney Aluminium Superstructure de cuve d'électrolyse de très haute intensité pour la production d'aluminium.
US5538607A (en) * 1995-04-12 1996-07-23 Pate; Ray H. Anode assembly comprising an anode bar for the production of molten metal by electrolysis
US5938914A (en) * 1997-09-19 1999-08-17 Aluminum Company Of America Molten salt bath circulation design for an electrolytic cell
FR2842215B1 (fr) * 2002-07-09 2004-08-13 Pechiney Aluminium Procede et systeme de refroidissement d'une cuve d'electrolyse pour la production d'aluminium
AU2006227546B2 (en) * 2005-03-24 2010-06-03 Bhp Billiton Innovation Pty Ltd Anode support apparatus
CN101155947B (zh) * 2005-03-24 2010-09-08 Bhp比利顿创新公司 阳极支承装置
CN102086524B (zh) * 2009-12-04 2013-12-25 贵阳铝镁设计研究院有限公司 自平衡应力的电解槽摇篮架
CN103132102B (zh) * 2011-11-25 2016-05-11 贵阳铝镁设计研究院有限公司 铝电解槽槽壳用防拱变形的可拆式中间支承装置
EA034760B1 (ru) * 2013-08-09 2020-03-17 Рио Тинто Алкан Интернэшнл Лимитед Электролизер для получения алюминия и электролизная установка, содержащая такой электролизер
EP3221495B1 (de) * 2014-11-21 2020-11-11 Hatch Ltd. Flacher aluminiumzellenkasten und verfahren zur erhöhung der produktionskapazität einer aluminiumzellenkastenstrasse
CN104911632B (zh) * 2015-05-26 2017-10-10 东北大学设计研究院（有限公司） 一种可拆装的分体式铝电解槽上部结构
GB2543788A (en) * 2015-10-28 2017-05-03 Dubai Aluminium Pjsc Superstructure for electrolytic cell, comprising means of moving anode beam with respect to the frame of this superstructure
BR112018069046B1 (pt) * 2016-03-25 2022-11-29 Alcoa Usa Corp Célula eletrolítica e método para a produção de metal de alumínio pela redução eletroquímica de alumina
CN105862079B (zh) * 2016-06-10 2017-12-22 河南永登铝业有限公司阳城分公司 铝电解槽上部结构在线顶升抬高机构及工艺
GB2571274A (en) * 2018-02-21 2019-08-28 Dubai Aluminium Pjsc Electrolytic cell with a superstructure having intermediate legs, suitable for the Hall-Heroult process
FR3093737B1 (fr) * 2019-03-14 2023-02-24 Rio Tinto Alcan Int Ltd Dispositif de manutention destiné à convoyer un outil d’intervention sur une cuve d’électrolyse.

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FR435561A (fr) * 1911-10-23 1912-03-05 Ludovic Courties Système de transporteur aérien utilisable pour le transport à terre des déblais et matériaux extraits par une drague fluviale
US2958635A (en) * 1957-12-24 1960-11-01 Oronzio De Nora Impianti Electrolytic cell cover
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FR1440005A (fr) * 1965-04-09 1966-05-27 Pechiney Prod Chimiques Sa Procédé pour la réalisation d'une superstructure pour cuve d'électrolyse ignée et superstructures réalisées selon ce procédé
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Also Published As

Publication number Publication date
ZA864014B (en) 1987-01-28
JPS6289889A (ja) 1987-04-24
ES8705051A1 (es) 1987-04-16
EP0210111A1 (de) 1987-01-28
FR2582677A1 (fr) 1986-12-05
IS1372B6 (is) 1989-06-30
US4720333A (en) 1988-01-19
OA08332A (fr) 1988-02-29
CN86103590A (zh) 1987-01-28
NO862132L (no) 1986-12-01
NZ216335A (en) 1990-01-29
GR861372B (en) 1986-08-27
YU91086A (en) 1987-12-31
BR8602470A (pt) 1987-01-27
ES555444A0 (es) 1987-04-16
AU5805586A (en) 1986-12-04
HUT44632A (en) 1988-03-28
IS3102A7 (is) 1986-12-01
ATE44555T1 (de) 1989-07-15
FR2582677B1 (fr) 1990-08-17
AU576469B2 (en) 1988-08-25
IN166372B (de) 1990-04-21
HU198532B (en) 1989-10-30
DE3664342D1 (en) 1989-08-17
CN1007360B (zh) 1990-03-28

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